Merge tag 'pm-5.14-rc8' of git://git.kernel.org/pub/scm/linux/kernel/…

…git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix two issues introduced during this cycle, one of which is a
  regression and the other one affects new code.

  Specifics:

   - Prevent the operating performance points (OPP) code from crashing
     when some entries in the table of required OPPs are set to error
     pointer values (Marijn Suijten)

   - Prevent the generic power domains (genpd) framework from
     incorrectly overriding the performance state of a device set by its
     driver while it is runtime-suspended or when runtime PM of it is
     disabled (Dmitry Osipenko)"

* tag 'pm-5.14-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM: domains: Improve runtime PM performance state handling
  opp: core: Check for pending links before reading required_opp pointers

drivers/base/power/domain.c

@@ -435,7 +435,7 @@ static void genpd_restore_performance_state(struct device *dev,
 int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state)
 {
 	struct generic_pm_domain *genpd;
-	int ret;
+	int ret = 0;
 
 	genpd = dev_to_genpd_safe(dev);
 	if (!genpd)
@@ -446,7 +446,13 @@ int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state)
 		return -EINVAL;
 
 	genpd_lock(genpd);
-	ret = genpd_set_performance_state(dev, state);
+	if (pm_runtime_suspended(dev)) {
+		dev_gpd_data(dev)->rpm_pstate = state;
+	} else {
+		ret = genpd_set_performance_state(dev, state);
+		if (!ret)
+			dev_gpd_data(dev)->rpm_pstate = 0;
+	}
 	genpd_unlock(genpd);
 
 	return ret;

drivers/opp/core.c

@@ -893,6 +893,10 @@ static int _set_required_opps(struct device *dev,
 	if (!required_opp_tables)
 		return 0;
 
+	/* required-opps not fully initialized yet */
+	if (lazy_linking_pending(opp_table))
+		return -EBUSY;
+
 	/*
 	 * We only support genpd's OPPs in the "required-opps" for now, as we
 	 * don't know much about other use cases. Error out if the required OPP
@@ -903,10 +907,6 @@ static int _set_required_opps(struct device *dev,
 		return -ENOENT;
 	}
 
-	/* required-opps not fully initialized yet */
-	if (lazy_linking_pending(opp_table))
-		return -EBUSY;
-
 	/* Single genpd case */
 	if (!genpd_virt_devs)
 		return _set_required_opp(dev, dev, opp, 0);